Single-top-squark production via R-parity-violating supersymmetric couplings in hadron collisions

Single-top-squark production via qq' --> (t) over tilde(1) probes R-parity- violating extensions of the minimal supersymmetric standard model through t he lambda(3ij)" couplings. For masses in the range 180-325 GeV, and lambda( 3ij)" > 0.02-0.06, we show that discovery of the top squark is possible wit h 2 fb(-1) of integrated luminosity at run II of the Fermilab Tevatron. The bound on lambda(3ij)" can be reduced by up to 1 order of magnitude with ex isting data from run I, and by 2 orders of magnitude at run IT if the top s quark is not found.